/Engine/Plugins/MovieScene/MovieRenderPipeline/Source/MovieRenderPipelineCore/Public/Graph/MovieGraphBlueprintLibrary.h
In case of overscan percentage being higher than 0, additional pixels are rendered. This function returns the resolution with overscan taken into account.
static FIntPoint GetEffectiveOutputResolution ( [UMovieGraphEvaluatedConfig](API\Plugins\MovieRenderPipelineCore\Graph\UMovieGraphEvaluatedConfig) * InEvaluatedGraph, const [FName](API\Runtime\Core\UObject\FName) & InBranchName )